This backyard beanbag-toss game that caught fire in the Midwest now boasts its own association, Wikipedia entry, and myriad online purveyors. It's easy to see why it's become such a barbeque favorite: You can hold a beverage in one hand and loft your beanbag with the other. You can easily make a game board to be proud of with plywood and 2x4s. As for your poor aim? Nothing a few well-chosen teammates can't overcome.
For full step-by-step instructions, see How to Build a Cornhole Game Board
. And, guess what? There's a How to Build a Cornhole Game Board